CVE-2018-6480

Description

A type confusion issue was discovered in CCN-lite 2, leading to a memory access violation and a failure of the nonce feature (which, for example, helped with loop prevention). ccnl_fwd_handleInterest assumes that the union member s is of type ccnl_pktdetail_ndntlv_s. However, if the type is in fact struct ccnl_pktdetail_ccntlv_s or struct ccnl_pktdetail_iottlv_s, the memory at that point is either uninitialised or points to data that is not a nonce, which renders the code using the local variable nonce pointless. A later nonce check is insufficient.

Weakness classification

• CWE-704: Incorrect Type Conversion or Cast

Primary references

• cve@mitre.org — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory